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The reaction $pp \to ppπ^0$ near threshold

C. Hanhart·J. Haidenbauer·A. Reuber·C. Schütz·J. Speth
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Abstract

We perform a momentum-space calculation of the reaction $pp \rightarrow ppπ^0$ near threshold. Direct production and pion rescattering are taken into account. For the latter a T-matrix obtained from a microscopic model of the $πN$ interaction is employed. The effects of some approximations commonly used in studies of $ pp \rightarrow ppπ^0$ \ are discussed. We find that those approximations overestimate the cross section and also modify its energy dependence. We obtain a significant contribution from rescattering, but not nearly enough to describe the data.

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C. Hanhart, J. Haidenbauer, A. Reuber, C. Schütz, J. Speth. 1995-08-02. The reaction $pp \to ppπ^0$ near threshold. https://doi.org/10.1016/0370-2693(95)00998-z

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